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Duckdb issues #46

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changhiskhan opened this issue Jul 22, 2022 · 1 comment
Closed
2 of 5 tasks

Duckdb issues #46

changhiskhan opened this issue Jul 22, 2022 · 1 comment
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c++ C++ issues duckdb help wanted Extra attention is needed

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@changhiskhan
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Keep track of a list of duckdb issues to support sophon's workload. We can later decide whether we want to report these issues/feature requests to upstream.

  • Duckdb does not pushdown LIMIT / OFFSET via Apache Arrow. Apache Arrow does not support LIMIT / OFFSET in Scanner in general.
    • We might need to tune he batch size to simulate the "limit" request.
  • Does not support projection over list<struct>
>>> duckdb.query("SELECT annotations.label FROM coco")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
RuntimeError: Binder Error: Cannot extract field 'label' from expression "annotations" because it is not a struct
@eddyxu eddyxu added duckdb c++ C++ issues labels Jul 24, 2022
@eddyxu eddyxu mentioned this issue Jul 26, 2022
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@eddyxu eddyxu added the help wanted Extra attention is needed label Jul 28, 2022
@eddyxu
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eddyxu commented Aug 1, 2022

jorgecarleitao/arrow2#1180 arrow2 (rust) has limit pushdown for parquet

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@eddyxu @changhiskhan